diff --git a/.vscode/extensions.json b/.vscode/extensions.json
deleted file mode 100644
index f23caea..0000000
--- a/.vscode/extensions.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  "recommendations": [
-    "editorconfig.editorconfig",
-    "kamadorueda.alejandra",
-    "jnoortheen.nix-ide",
-    "mkhl.direnv",
-  ]
-}
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
deleted file mode 100644
index 9197699..0000000
--- a/.vscode/settings.json
+++ /dev/null
@@ -1,13 +0,0 @@
-{
-  "files.exclude": {
-    // defaults
-    "**/.git": true,
-    "**/.svn": true,
-    "**/.hg": true,
-    "**/CVS": true,
-    "**/.DS_Store": true,
-    "**/Thumbs.db": true,
-    // extras
-    "**/.direnv": true,
-  }
-}
\ No newline at end of file
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
deleted file mode 100644
index 0729317..0000000
--- a/.vscode/tasks.json
+++ /dev/null
@@ -1,11 +0,0 @@
-{
-  "version": "2.0.0",
-  "tasks": [
-    {
-      "label": "flake upgrade",
-      "type": "shell",
-      "command": "tmux new -s flake-update .vscode/upgrade.sh",
-      "problemMatcher": []
-    }
-  ]
-}
\ No newline at end of file
diff --git a/.vscode/upgrade.sh b/.vscode/upgrade.sh
deleted file mode 100755
index f3ecb90..0000000
--- a/.vscode/upgrade.sh
+++ /dev/null
@@ -1,26 +0,0 @@
-# error handler
-handle_error() {
-  echo "Upgrade failed."
-  read -p "Press Enter to exit..."
-  exit 1
-}
-
-# stop on error
-set -euxo pipefail
-
-# trap any errors and call handle_error
-trap 'handle_error "$BASH_COMMAND"' ERR
-
-# update lock file
-nix flake update
-
-# update systems
-sudo nixos-rebuild switch -L --flake .#silicium
-nixos-rebuild switch -L --flake .#cesium --target-host cesium
-
-# commit and push lock file
-git add flake.lock
-git commit -m "⬆️ nix flake update"
-git push
-
-echo "Upgrade successful"
diff --git a/flake.nix b/flake.nix
index bd5c198..0fbd372 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,9 +1,6 @@
 {
   description = "Laureηt's infrastructure";
 
-  # TODO: luks encrypt cesium (dropbear ?)
-  # TODO: setup disko sur silicium
-
   inputs = {
     # core stuff
     nixpkgs = {
diff --git a/home/shell/git.nix b/home/shell/git.nix
index ae0fae8..d90989b 100644
--- a/home/shell/git.nix
+++ b/home/shell/git.nix
@@ -2,7 +2,6 @@
   sign_key =
     {
       "aurum" = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIItSJTtS7tO0Wz/WgHAFb3xuNFZpm8SOvr/o8uR83zzy laurent@aurum";
-      "silicium" = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINTvwXCT99s1EwOCeGQ28jyCAH/RBoLZza9k5I7wWdEu laurent@silicium";
     }
     ."${osConfig.networking.hostName}";
 in {
diff --git a/hosts/aurum/system/impermanence/default.nix b/hosts/aurum/system/impermanence/default.nix
index 3d86a47..0cb8ebd 100644
--- a/hosts/aurum/system/impermanence/default.nix
+++ b/hosts/aurum/system/impermanence/default.nix
@@ -12,7 +12,7 @@
     files = [
       "/etc/machine-id"
     ];
-    # TODO: move this into home config, when silicium has impermanence too
+    # TODO: move this into home config
     users.laurent = {
       directories = [
         "Documents"
diff --git a/hosts/cesium/system/users/default.nix b/hosts/cesium/system/users/default.nix
index 6c5d8cf..21a8595 100644
--- a/hosts/cesium/system/users/default.nix
+++ b/hosts/cesium/system/users/default.nix
@@ -1,7 +1,7 @@
 {...}: {
   users.mutableUsers = false;
   users.users.root.openssh.authorizedKeys.keys = [
-    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINTvwXCT99s1EwOCeGQ28jyCAH/RBoLZza9k5I7wWdEu laurent@silicium"
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINTvwXCT99s1EwOCeGQ28jyCAH/RBoLZza9k5I7wWdEu laurent@silicium" # TODO: remove this
     "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIItSJTtS7tO0Wz/WgHAFb3xuNFZpm8SOvr/o8uR83zzy laurent@aurum"
   ];
 }
diff --git a/hosts/default.nix b/hosts/default.nix
index 4ba3a07..a192223 100644
--- a/hosts/default.nix
+++ b/hosts/default.nix
@@ -14,25 +14,6 @@ in {
   # desktop would be neon
   # smartphone would be lithium
 
-  # personal laptop
-  silicium = nixpkgs.lib.nixosSystem {
-    system = "x86_64-linux";
-    specialArgs = {
-      inherit inputs;
-    };
-    modules = [
-      ./silicium
-      inputs.home-manager.nixosModules.home-manager
-      inputs.agenix.nixosModules.default
-      inputs.lanzaboote.nixosModules.lanzaboote
-      inputs.nixos-hardware.nixosModules.common-cpu-amd
-      inputs.nixos-hardware.nixosModules.common-gpu-nvidia-disable
-      inputs.nixos-hardware.nixosModules.common-pc-laptop
-      inputs.nixos-hardware.nixosModules.common-pc-laptop-ssd
-      {inherit home-manager;}
-    ];
-  };
-
   # work laptop
   aurum = nixpkgs.lib.nixosSystem {
     system = "x86_64-linux";
diff --git a/hosts/silicium/default.nix b/hosts/silicium/default.nix
deleted file mode 100644
index ee1338d..0000000
--- a/hosts/silicium/default.nix
+++ /dev/null
@@ -1,30 +0,0 @@
-{pkgs, ...}: {
-  imports = [
-    ./system
-    ./services
-  ];
-
-  # shorter timeout for systemd services
-  systemd.extraConfig = ''
-    DefaultTimeoutStopSec=10s
-  '';
-
-  services.dbus.enable = true;
-  xdg.portal = {
-    enable = true;
-    wlr.enable = true;
-
-    config = {
-      common.default = ["wlr" "gtk"];
-      hyprland.default = ["hyprland"];
-    };
-    extraPortals = [
-      pkgs.xdg-desktop-portal-gtk
-      pkgs.xdg-desktop-portal-wlr
-      pkgs.xdg-desktop-portal-hyprland
-    ];
-  };
-
-  # enable gnome virtual file system
-  services.gvfs.enable = true;
-}
diff --git a/hosts/silicium/services/borgbackup/default.nix b/hosts/silicium/services/borgbackup/default.nix
deleted file mode 100644
index 85cdde1..0000000
--- a/hosts/silicium/services/borgbackup/default.nix
+++ /dev/null
@@ -1,46 +0,0 @@
-{config, ...}: {
-  services.borgbackup.jobs.home = {
-    paths = "/home/laurent/";
-    repo = "/mnt/home_backup";
-    exclude = [
-      # Largest cache dirs
-      ".cache"
-      ".compose-cache"
-      "*/cache"
-      "*/cache2" # firefox
-      "*/Cache"
-      "*/Code Cache"
-      "*/blob_storage"
-      ".config/Slack/logs"
-      ".config/Code/CachedData"
-      ".container-diff"
-      ".npm/_cacache"
-      # Work related dirs
-      "*/node_modules"
-      "*/bower_components"
-      "*/build"
-      "*/_build"
-      "*/.tox"
-      "*/venv"
-      "*/.venv"
-      "*/.direnv"
-    ];
-    encryption = {
-      mode = "repokey";
-      passCommand = "cat ${config.age.secrets.borgbackup.path}";
-    };
-    compression = "auto,zstd";
-    startAt = [];
-  };
-  services.borgbackup.jobs.keepass = {
-    paths = "/home/laurent/Documents/db_mdp.kdbx";
-    repo = "ssh://root@fainsin.bzh:624/srv/backup/keepass";
-    user = "laurent";
-    encryption = {
-      mode = "repokey";
-      passCommand = "cat ${config.age.secrets.borgbackup.path}";
-    };
-    compression = "auto,zstd";
-    startAt = "12:00";
-  };
-}
diff --git a/hosts/silicium/services/default.nix b/hosts/silicium/services/default.nix
deleted file mode 100644
index e307211..0000000
--- a/hosts/silicium/services/default.nix
+++ /dev/null
@@ -1,6 +0,0 @@
-{...}: {
-  imports = [
-    ./borgbackup
-    ./greetd
-  ];
-}
diff --git a/hosts/silicium/services/greetd/default.nix b/hosts/silicium/services/greetd/default.nix
deleted file mode 100644
index f0b67ca..0000000
--- a/hosts/silicium/services/greetd/default.nix
+++ /dev/null
@@ -1,12 +0,0 @@
-{pkgs, ...}: {
-  services.greetd = {
-    enable = true;
-
-    settings = {
-      default_session = {
-        command = "${pkgs.greetd.tuigreet}/bin/tuigreet --time --cmd ${pkgs.hyprland}/bin/Hyprland";
-        user = "greeter";
-      };
-    };
-  };
-}
diff --git a/hosts/silicium/system/adb/default.nix b/hosts/silicium/system/adb/default.nix
deleted file mode 100644
index 01fbd94..0000000
--- a/hosts/silicium/system/adb/default.nix
+++ /dev/null
@@ -1,7 +0,0 @@
-{pkgs, ...}: {
-  # udev rules
-  services.udev.packages = [pkgs.android-udev-rules];
-
-  # adb users
-  users.users.laurent.extraGroups = ["adbusers"];
-}
diff --git a/hosts/silicium/system/age/default.nix b/hosts/silicium/system/age/default.nix
deleted file mode 100644
index 0fc4b42..0000000
--- a/hosts/silicium/system/age/default.nix
+++ /dev/null
@@ -1,8 +0,0 @@
-{...}: {
-  age.secrets.borgbackup = {
-    file = ../../../../secrets/borgbackup.age;
-    owner = "laurent";
-    group = "users";
-  };
-  age.identityPaths = ["/home/laurent/.ssh/id_ed25519"];
-}
diff --git a/hosts/silicium/system/audio/default.nix b/hosts/silicium/system/audio/default.nix
deleted file mode 100644
index e04ca2b..0000000
--- a/hosts/silicium/system/audio/default.nix
+++ /dev/null
@@ -1,7 +0,0 @@
-{...}: {
-  services.pipewire = {
-    enable = true;
-    alsa.enable = true;
-    pulse.enable = true;
-  };
-}
diff --git a/hosts/silicium/system/boot/default.nix b/hosts/silicium/system/boot/default.nix
deleted file mode 100644
index cd2e97d..0000000
--- a/hosts/silicium/system/boot/default.nix
+++ /dev/null
@@ -1,24 +0,0 @@
-{
-  pkgs,
-  config,
-  ...
-}: {
-  # support for mounting windaube partitions
-  boot.supportedFilesystems = ["ntfs"];
-  boot.loader.efi.canTouchEfiVariables = true;
-
-  # clean /tmp at each boot
-  boot.tmp.cleanOnBoot = true;
-
-  # use latest kernel
-  boot.kernelPackages = pkgs.linuxPackages_latest;
-
-  imports = [
-    ./lanzaboot.nix
-  ];
-
-  boot.initrd.availableKernelModules = ["nvme" "xhci_pci" "ahci" "usb_storage" "usbhid" "sd_mod"];
-  boot.initrd.kernelModules = [];
-  boot.kernelModules = ["kvm-amd" "v4l2loopback"];
-  boot.extraModulePackages = with config.boot.kernelPackages; [v4l2loopback];
-}
diff --git a/hosts/silicium/system/boot/lanzaboot.nix b/hosts/silicium/system/boot/lanzaboot.nix
deleted file mode 100644
index 72dd6e0..0000000
--- a/hosts/silicium/system/boot/lanzaboot.nix
+++ /dev/null
@@ -1,16 +0,0 @@
-{lib, ...}: {
-  # This should already be here from switching to bootspec earlier.
-  # It's not required anymore, but also doesn't do any harm.
-  boot.bootspec.enable = true;
-
-  # Lanzaboote currently replaces the systemd-boot module.
-  # This setting is usually set to true in configuration.nix
-  # generated at installation time. So we force it to false
-  # for now.
-  boot.loader.systemd-boot.enable = lib.mkForce false;
-
-  boot.lanzaboote = {
-    enable = true;
-    pkiBundle = "/etc/secureboot";
-  };
-}
diff --git a/hosts/silicium/system/default.nix b/hosts/silicium/system/default.nix
deleted file mode 100644
index e8ef07b..0000000
--- a/hosts/silicium/system/default.nix
+++ /dev/null
@@ -1,24 +0,0 @@
-{...}: {
-  # This value determines the NixOS release from which the default
-  # settings for stateful data, like file locations and database versions
-  # on your system were taken. It‘s perfectly fine and recommended to leave
-  # this value at the release version of the first install of this system.
-  # Before changing this value read the documentation for this option
-  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
-  system.stateVersion = "24.05"; # Did you read the comment?
-
-  imports = [
-    ./adb
-    ./age
-    ./audio
-    ./boot
-    ./docker
-    ./fonts
-    ./hardware
-    ./i18n
-    ./networking
-    ./nix
-    ./security
-    ./users
-  ];
-}
diff --git a/hosts/silicium/system/docker/default.nix b/hosts/silicium/system/docker/default.nix
deleted file mode 100644
index f94fbc4..0000000
--- a/hosts/silicium/system/docker/default.nix
+++ /dev/null
@@ -1,12 +0,0 @@
-{...}: {
-  virtualisation.docker = {
-    enable = true;
-
-    storageDriver = "btrfs";
-    enableOnBoot = false;
-    autoPrune.enable = true;
-  };
-
-  # docker users
-  users.users.laurent.extraGroups = ["docker"];
-}
diff --git a/hosts/silicium/system/fonts/default.nix b/hosts/silicium/system/fonts/default.nix
deleted file mode 100644
index 57362a4..0000000
--- a/hosts/silicium/system/fonts/default.nix
+++ /dev/null
@@ -1,16 +0,0 @@
-{pkgs, ...}: {
-  fonts.packages = with pkgs; [
-    # https://notofonts.github.io/
-    noto-fonts # standard characters
-    noto-fonts-lgc-plus # latin, greek, and cyrillic
-    noto-fonts-cjk # chinese, japanese, and korean
-    noto-fonts-emoji # emojis 🐢
-
-    # https://github.com/tonsky/FiraCode
-    fira-code # standard characters
-    fira-code-symbols # unicode ligature glyphs
-
-    # https://github.com/ryanoasis/nerd-fonts
-    (nerdfonts.override {fonts = ["FiraCode"];})
-  ];
-}
diff --git a/hosts/silicium/system/hardware/default.nix b/hosts/silicium/system/hardware/default.nix
deleted file mode 100644
index d8d7518..0000000
--- a/hosts/silicium/system/hardware/default.nix
+++ /dev/null
@@ -1,33 +0,0 @@
-{...}: {
-  # hardware
-  hardware = {
-    enableRedistributableFirmware = true;
-    graphics.enable = true;
-  };
-
-  # logind configuration
-  services.logind = {
-    lidSwitch = "ignore";
-    extraConfig = ''
-      HandlePowerKey=suspend
-    '';
-  };
-
-  # tlp, power management
-  services.tlp.enable = true;
-
-  # thermald, controls temperature
-  services.thermald.enable = true;
-
-  # bluetooth
-  hardware.bluetooth.enable = true;
-  services.blueman.enable = true;
-
-  # backlight intensity
-  programs.light.enable = true;
-
-  # partitions and filesystems
-  imports = [
-    ./partitions.nix
-  ];
-}
diff --git a/hosts/silicium/system/hardware/partitions.nix b/hosts/silicium/system/hardware/partitions.nix
deleted file mode 100644
index 7f31605..0000000
--- a/hosts/silicium/system/hardware/partitions.nix
+++ /dev/null
@@ -1,24 +0,0 @@
-{
-  config,
-  lib,
-  ...
-}: {
-  fileSystems."/" = {
-    device = "/dev/disk/by-uuid/b0ea5f1f-104f-4026-840a-4d46f3e827d1";
-    fsType = "btrfs";
-    options = ["subvol=nixos"];
-  };
-
-  boot.initrd.luks.devices."nixenc".device = "/dev/disk/by-uuid/93d0b0d8-b586-48cf-acc2-025fba1eaadb";
-
-  fileSystems."/boot" = {
-    device = "/dev/disk/by-uuid/6D10-BBAF";
-    fsType = "vfat";
-  };
-
-  swapDevices = [];
-
-  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
-  hardware.cpu.amd.updateMicrocode =
-    lib.mkDefault config.hardware.enableRedistributableFirmware;
-}
diff --git a/hosts/silicium/system/i18n/default.nix b/hosts/silicium/system/i18n/default.nix
deleted file mode 100644
index 90f1921..0000000
--- a/hosts/silicium/system/i18n/default.nix
+++ /dev/null
@@ -1,10 +0,0 @@
-{...}: {
-  # FRANCE 🇫🇷 🥖 🥐
-  time.timeZone = "Europe/Paris";
-
-  # azerty keyboard
-  console.keyMap = "fr";
-
-  # english ISO metric system
-  i18n.defaultLocale = "en_DK.UTF-8";
-}
diff --git a/hosts/silicium/system/networking/default.nix b/hosts/silicium/system/networking/default.nix
deleted file mode 100644
index 2b7873e..0000000
--- a/hosts/silicium/system/networking/default.nix
+++ /dev/null
@@ -1,18 +0,0 @@
-{...}: {
-  networking = {
-    # the name of the machine
-    hostName = "silicium";
-
-    # domain name servers, use clouflare family
-    nameservers = ["1.1.1.2" "1.0.0.2"];
-
-    # use networkManager, see nmcli
-    networkmanager.enable = true;
-
-    # firewall
-    firewall.enable = true;
-
-    # https://github.com/StevenBlack/hosts
-    stevenblack.enable = true;
-  };
-}
diff --git a/hosts/silicium/system/nix/default.nix b/hosts/silicium/system/nix/default.nix
deleted file mode 100644
index de89db3..0000000
--- a/hosts/silicium/system/nix/default.nix
+++ /dev/null
@@ -1,47 +0,0 @@
-{
-  lib,
-  pkgs,
-  inputs,
-  ...
-}: {
-  # restrict nix command to sudoers
-  nix.settings.allowed-users = ["root" "@wheel"];
-  nix.settings.trusted-users = ["root" "@wheel"];
-
-  # experimental features
-  nix.settings.experimental-features = ["nix-command" "flakes"];
-
-  # limit number of cores when building
-  nix.settings.max-jobs = 6;
-
-  # optimizations
-  nix.settings.auto-optimise-store = true;
-  nix.optimise = {
-    automatic = true;
-    dates = ["12:00"];
-  };
-
-  # garbage collection
-  nix.gc = {
-    automatic = true;
-    dates = "12:00";
-    options = "--delete-older-than 30d";
-  };
-
-  # pin nixpkgs registry
-  nix.registry.nixpkgs.flake = inputs.nixpkgs;
-
-  # list of allowed unfree packages
-  nixpkgs.config.allowUnfreePredicate = pkg:
-    builtins.elem (lib.getName pkg) [
-      "vscode"
-      "vscode-extension-github-copilot"
-      "vscode-extension-github-copilot-chat"
-    ];
-
-  # print diff between two generations
-  system.activationScripts.nvd-report-changes = ''
-    PATH=$PATH:${lib.makeBinPath [pkgs.nvd pkgs.nix]}
-    nvd diff $(ls -dv /nix/var/nix/profiles/system-*-link | tail -2)
-  '';
-}
diff --git a/hosts/silicium/system/security/default.nix b/hosts/silicium/system/security/default.nix
deleted file mode 100644
index 2cee319..0000000
--- a/hosts/silicium/system/security/default.nix
+++ /dev/null
@@ -1,17 +0,0 @@
-{pkgs, ...}: {
-  # enable polkit
-  security.polkit.enable = true;
-
-  # enable gpg agent
-  programs.gnupg.agent = {
-    enable = true;
-    enableSSHSupport = true;
-    pinentryPackage = pkgs.pinentry-gnome3;
-  };
-
-  # secrets keyring
-  services.gnome.gnome-keyring.enable = true;
-
-  # allow swaylock to use pam
-  security.pam.services.swaylock = {};
-}
diff --git a/hosts/silicium/system/users/default.nix b/hosts/silicium/system/users/default.nix
deleted file mode 100644
index c7b96a7..0000000
--- a/hosts/silicium/system/users/default.nix
+++ /dev/null
@@ -1,13 +0,0 @@
-{...}: {
-  # disable user creation/deletion
-  users.mutableUsers = false;
-
-  # configure users
-  users = {
-    users.laurent = {
-      isNormalUser = true;
-      initialPassword = "laurent";
-      extraGroups = ["wheel" "video"];
-    };
-  };
-}
diff --git a/secrets/secrets.nix b/secrets/secrets.nix
index 1cef618..1a2f29c 100644
--- a/secrets/secrets.nix
+++ b/secrets/secrets.nix
@@ -1,5 +1,5 @@
 let
-  silicium = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINTvwXCT99s1EwOCeGQ28jyCAH/RBoLZza9k5I7wWdEu laurent@silicium";
+  silicium = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINTvwXCT99s1EwOCeGQ28jyCAH/RBoLZza9k5I7wWdEu laurent@silicium"; # TODO: remove this
   cesium = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDVxpWbNJl+OXe6YImMpsJprfuTd+9UJVTiteiuyx6oP root@cesium";
 in {
   "borgbackup.age".publicKeys = [silicium];